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Method for calculating rock weathering soil-forming rate in karst area

A karst and rate technology, applied in the field of soil science, can solve the problems of large errors in soil and water conservation planning and design, low precision, soil water and soil loss, etc., and achieve the effect of accurate estimation of soil erosion

Inactive Publication Date: 2018-09-04
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for calculating the rate of rock weathering and soil formation in karst areas, so as to solve the large errors in the prediction of soil water and soil loss and the planning and design of water and soil conservation in karst areas through the RUSLE soil erosion model in the prior art. Problems such as low precision

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  • Method for calculating rock weathering soil-forming rate in karst area
  • Method for calculating rock weathering soil-forming rate in karst area
  • Method for calculating rock weathering soil-forming rate in karst area

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Embodiment Construction

[0044] The present invention proposes a method for calculating the rate of rock weathering into soil in karst areas, which comprises the following steps:

[0045] First, data acquisition and preprocessing. The data needed to calculate the soil erosion modulus are: daily precipitation data, soil texture and organic matter content, digital elevation model (DEM), normalized difference vegetation index (NDVI) and land use type. The data needed to calculate the pedogenesis rate of carbonate rocks include lithology vector data, carbonate rock dissolution rate, percentage of acid insoluble matter, percentage of carbonate rock content, carbonate rock density, and non-carbonate rock pedogenesis rate. After obtaining the relevant data, reproject the data to make it have a unified projection system and coordinates; perform preliminary calculations on the data to make it meet the requirements of the model calculation.

[0046] Second, calculate the theoretical soil erosion modulus. Base...

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Abstract

The invention provides a method for calculating the rock weathering soil-forming rate in a karst area. The method comprises the steps that 1 data collecting and data preprocessing are carried out; 2 soil erosion modulus calculating is carried out, and specifically based on a modified general soil loss equation (RUSLE model) each factor is calculated to acquire the theoretical erosion modulus of the karst area; 3 the maximum dissolution rate of carbonate rock is calculated, and specifically based on a meteorological hydrology and geochemical spatiotemporal data set, a carbonate rock thermal dynamic dissolution model is used to calculate the maximum dissolution rate of carbonate rock; and 4 the rock weathering soil-forming rate in the karst area is calculated. The problems of large errors, low precision and the like of soil and water loss prediction and soil and water conservation planning design and the like through a RUSLE soil erosion model in the karst area in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of soil science, in particular to a method for calculating the soil-forming rate of rock weathering in karst areas. Background technique [0002] The soil erosion prediction model is an effective means for soil erosion prediction and soil and water conservation planning, so the accuracy of the prediction value is directly related to regional ecological assessment and safety. The karst area is restricted by the karst environment, and the soil formation is very slow. Therefore, the prediction of the soil erosion modulus in this area needs to be considered comprehensively in conjunction with the allowable soil loss. [0003] First, based on the RUSLE soil erosion model and GIS and RS techniques, various factors of soil erosion were obtained, including rainfall erosivity factor (R), soil erodibility factor (K), terrain factor (LS), vegetation cover and crop management factor ( C) and the soil conservation measur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26
CPCG06Q10/04G06Q50/26Y02A40/22
Inventor 白晓永操玥李汇文钱庆欢陈飞曾成
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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